JPH07235206A - Luminaire - Google Patents

Abstract

PURPOSE:To reduce unevenness of brightiness on a light transmissive panel face and make partial deterioration of the light transmissive panel hardly occur due to temperature rise. CONSTITUTION:A luminaire is composed of an appliance main body 1 having a square column shape and open parts in all of the side faces, four opaline panels 2 attached to the four opening parts of the appliance main body 1, four fluorescent lamps 3 placed in the appliance main body 1, oppositely to the opaline panels 2 and four sockes 4 fixed respectively to both upper and lower ends of the appliance main body 1, and the four fluorescent lamps 3 are set slant in a plane in parallel to the respective opposing opaline panels 2. When observed from the front of the opaline panels 2, the fluorescent lamp 3 in the front side and the fluorescent lamp 3 in the rear side are arranged while crossing, each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture.

[0002]

2. Description of the Related Art FIGS. 3 to 5 show a conventional luminaire. The luminaire mainly has a square tube-shaped instrument body 1 having openings on all sides and four openings of the instrument body 1. Opalescent panel 2 which is four translucent panels that are attached to the section
And four fluorescent lamps 3 which are long lamps housed in the instrument body 1 and having caps at both ends, and four sockets 4 fixed to each of the upper and lower ends of the instrument body 1 respectively. The sockets 4 are arranged at the rear of the central portion of each opal white panel 2 in the width direction, and are arranged in the vertical direction so as to face each other by two. Therefore, when the lighting equipment is viewed from the front side of the center line of each opalescent panel 2, as shown in FIG. 5, the fluorescent lamps 3 are doubly arranged in the central portion and the fluorescent lamps 3 are arranged on both sides.
It becomes the form that one is arranged.

[0003]

However, in the conventional lighting device thus constructed, when the lighting device is viewed from the front of each opal panel 2, as shown in FIG.
Since the fluorescent lamps 3 are doubly arranged in the central part and one fluorescent lamp 3 is arranged on both sides, the opalescent panel 2 is provided at the central part and both ends of the opalescent panel 2 where the fluorescent lamps 3 exist. There are three high brightness areas on the surface, and between the three high brightness areas, the brightness of the milky panel 2 surface is low, which causes uneven brightness on the milky panel 2 surface. there were.

Further, since the fluorescent lamps 3 are doubly arranged in the central portion, the temperature of the central portion of the opalescent panel 2 becomes higher than that of the peripheral portion due to the radiation heat of the fluorescent lamps 3,
There is a problem that the central part of the milky white panel 2 is more likely to be deteriorated due to temperature than the peripheral part.

The present invention has been made in view of the above problems. An object of the present invention is to reduce uneven brightness on the surface of the transparent panel and prevent the transparent panel surface from locally deteriorating due to temperature rise. The purpose is to provide lighting equipment.

[0006]

In order to solve the above-mentioned problems, the present invention is directed to a device body in the shape of a rectangular tube having openings on all side surfaces, a plurality of light-transmissive panels mounted on the openings, and the translucent panel. In a lighting fixture having a plurality of long lamps arranged facing the optical panel and housed in the fixture body, the lamp is tilted in a plane parallel to the facing translucent panel. Is a cross.

[0007]

As described above, in the lighting equipment of the present invention,
A rectangular tube-shaped instrument body having openings on all side surfaces, a plurality of light-transmitting panels mounted in the openings, and a plurality of light-transmissive panels which are arranged so as to face the light-transmitting panels and are housed in the instrument body. In a luminaire having a long lamp of, since the lamps are crossed by inclining the lamps in a plane parallel to the translucent panels facing each other, when the luminaires are viewed from the front of each translucent panel, At the center of the translucent panel, lamps facing the translucent panel on the front side and the translucent panel on the back side are arranged so as to intersect with each other. Similarly, one lamp intersects each other when viewed from the panel surface, so there are four areas with high brightness, and the areas with high brightness are dispersed over the surface of the transparent panel, resulting in uneven brightness on the surface of the transparent panel. Is less.

Further, since the front lamp and the rear lamp overlap with each other in the central portion of the translucent panel, the overlapping portion is reduced.
The temperature of the central portion of the transparent panel surface is lowered, and the transparent panel is less likely to locally deteriorate due to the temperature rise.

[0009]

FIG. 1 shows an embodiment of the present invention.
The lighting fixture shown in FIG. 1 mainly has a rectangular tube-shaped instrument body 1 having openings on all side surfaces, and a milky panel 2 which is four translucent panels attached to the four openings of the instrument body 1. The fluorescent lamps 3 are four long lamps that are housed in the device body 1 so as to face the milky panel 2, and four sockets 4 are fixed to the upper and lower ends of the device body 1, respectively.

The instrument body 1 comprises a rectangular base 1a, a bar 1b standing upright from the four corners of the base 1a and having an L-shaped cross section, and a lid 1c fixed to the upper end of the bar 1b. The opalescent panel 2 is fixed to the inner surface of the opening between the crosspieces 1b and 1b of the instrument body 1.

When the arbitrary milky panel 2 is on the front side, the socket 4 is in a plane parallel to the milky panel 2 on the front side and near the corner of the base 1a on one side surface of the instrument body 1. Near the corners of the lid 1c on the other side surface of the instrument body 1, they are diagonally opposed to each other and attached to the milky panel 2 on the back side. And the fluorescent lamps 3 mounted in the pair of sockets 4 on the front side and the fluorescent lamps 3 mounted in the pair of sockets 4 on the back side intersect each other in an X shape. Has been done.

Therefore, when the luminaire is viewed from the front side of each milk white panel 2, the fluorescent lamps 3 facing the milk white panel 2 on the front side and the milk white panel 2 on the back side intersect at the center of the milk white panel 2. On both sides of the fluorescent lamps 3 which are arranged in a crossed manner, one fluorescent lamp 3 which is also crossed when seen from the opal panel 2 surface on both sides is arranged, so that a high brightness portion is provided. Since there are four, high brightness areas are dispersed on the surface of the milky white panel 2 and the uneven brightness on the surface of the milky white panel 2 is reduced.

Further, in the central portion of the opalescent panel, since the overlapping portion of the front fluorescent lamp 3 and the rear fluorescent lamp 3 is reduced, the temperature of the central portion of the opal panel 2 surface is lowered,
Local deterioration of the milky white panel 2 due to temperature rise is less likely to occur.

Although the translucent panel is the opalescent panel in the above embodiment, the present invention is not limited to this and may be a translucent panel such as a prism panel.

[0015]

As described above, in the lighting apparatus of the present invention, a rectangular tube-shaped apparatus body having openings on all side surfaces, a plurality of light-transmitting panels mounted in the openings, and the light-transmitting panel. In a lighting fixture having a plurality of long lamps, which are arranged to face each other, and are housed in the fixture body,
Since the lamps are crossed by inclining the lamps in a plane parallel to the translucent panels facing each other, when the lighting equipment is viewed from the front of each translucent panel, the central part of the translucent panel has a front translucent panel. Lamps facing the light panel and the translucent panel on the back side are arranged so as to intersect with each other. Since one line is arranged, there are four high-luminance portions, and the high-luminance regions are dispersed on the light-transmissive panel surface to reduce the uneven brightness on the light-transmissive panel surface.

Further, in the central portion of the translucent panel, the overlapping portion of the front lamp and the rear lamp is reduced,
The temperature of the central portion of the transparent panel surface is lowered, and the transparent panel is less likely to locally deteriorate due to the temperature rise.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing a conventional example.

FIG. 4 is a cross-sectional view showing a conventional example.

FIG. 5 is a front view showing a conventional example.

[Explanation of symbols]

 1 Instrument main body 2 Transparent panel 3 Lamp

Claims (1)

[Claims] 1. An instrument body in the shape of a rectangular tube having an opening on all side surfaces, a plurality of light-transmitting panels mounted in the opening, and a plurality of light-transmitting panels which are disposed so as to face each of the light-transmitting panels. And a plurality of elongated lamps housed in the lamp, wherein the lamps are tilted in a plane parallel to a translucent panel facing each other and the lamps are crossed.